CVE-2026-34232

HIGH7.5

Firebird: DoS via `op_response` packet from client

Published Apr 17, 2026

Modified 3 days ago

Details

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the xdr_status_vector() function does not handle the isc_arg_cstring type when decoding an op_response packet, causing a server crash when one is encountered in the status vector. An unauthenticated attacker can exploit this by sending a crafted op_response packet to the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

References

WEB

https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14

WEB

https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7

WEB

https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4

WEB

https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-7jq3-6j3c-5cm2

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-34232

CVSS Analysis